happiness comes in many, many forms, it is a vague category for anything good, so a joke is a small petal off the tree of laughter in the big world of happiness, and love, of any kind, be it friendship or a "companion", could be happiness between its own tree, to finding the other end of the red string of fate, blossoming an entire forest. there is also that greedy happiness of being rich or famous (i know all of us want that kind of happiness to >.<) although it does have happiness attached to it, it can also bring some sadness, so, it may bring weeds into your beautiful world, be wary.